Hygrometer Hub

Know just how much moisture is in your filament. I found these convenient low-cost temperature/humidity gauges on Amazon (search for EEEkit Hygrometer or oolong hygrometer). They are really neat, but I needed to make them visible when I bagged my filament. So I made an adapter which fits neatly into the hub of your filament spool (well the BambuLab one anyway). The hygrometer clicks neatly into the adapter. So when bagging, just add some desiccant and the hygrometer with its adapter before you vacuum your bag. You will then know exactly how much moisture in the roll, and you can also tell just how efficiently your bags and desiccant are working.